A 47-year-old U.S. postal worker was arrested Friday morning after detectives allegedly observed him purchasing prescription drugs while inside his postal vehicle.

Craig Godshall, of Burbank, was parked around 9 a.m. near 600 North Whitnall Highway when Burbank police officers conducting a narcotics investigation saw an alleged sale happening, according to police.

Godshall was wearing his uniform and on duty at the time of the incident, Burbank Police Sgt. Darin Ryburn said.

He allegedly purchased an unknown amount of Vicodin, said Ryburn.

The U.S. Postal Service removed the mail vehicle from the scene. Godshall's bail is set at $10,000 and his arraignment is slated for September 14.